Roofing sheet material



April 8, 1924. 1,489,898

5. PETERSEN ROOFING SHEET MATERIAL Filed July 21. 1922 2 Sheets-Sheet 1 Juucufoz April 8, 1924.-

S. PETERSEN ROOFING SHEET MATERIAL Filed July 21 1922 2 Sheets-Sheet 2 Patented Apro S llSZt entree snares igeaeee SVJEND PETWEN, OF ASKOV, MINNESWEA.

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Application filed July at, me. Serial a. 576,472.

To all whom it may concern:

Be it known that l, SvENo PETERSEN, citizen-of the United States, residing at Askov, in the county of Pine and State of Minnec sota, have invented certain new and useful Improvements in Roofing Sheet Material, of which the following is a specification.

This invention relates to improvements in sheet material, such as building or roofing 10 paper, and to a method of laying said sheet material. The invention also includes the roofing or wall covering formed by said sheet material.

The primary object of the invention is It to furnish improved sheet material which may be made up in rolls and which ma be laid to form roofing or a wall covering aving lapped joints adapted to prevent moisture and the like from penetrating through an the roofing or wall covering.

Another object of the invention is to provide roofing or wall covering which may expand to a greater extent than the roofing or wall covering material now in use, so that 2 the expansion of the material itself or the structure to which it is nailed, will not cause the roofing nails to be pulled out.

A further object of the invention is to provide roofi or building sheet material,

30 which may e laid in considerably less time than is required to lay ordinary roofing or building sheet material With the foregoing objects outlined and with'other objects in view which will apat pear as the description proceeds, the invention consists in the novel features and ste hereinafter described in detail, illustrated in the accompanyng drawings and more articularly pointed out in the appended claims.

Referring to the drawings:

Figure 1 is a perspective view of a roll of sheet material manufactured in accordance with my invention.

Fig. 2 is a plan view of portions of said to sheet material laid to form roofing or a wall covering.

Fig: 3 is a vertical sectional view of a portion of a roof of the building with my improved sheet material laid thereon in a to preferred manner.

Fig. 4 is a similiar view of a portion of a wall with building paper of m improved constructon laid thereon in a diii brent manner from that shown inFig. 3.

Fig. 5 is a perspective view illustratin 56 one edge portion of two of my improve sheets.

In Fig. 1 of the drawing, I have shown a roll of the improved roofing or building sheet material. This material is made up in long sheets and is then rolled in the manner illustrated. In the course of manufacture the edge portions 2 and 3 of the sheet are compressed so that theyare of approximately one-half the thickness of the remaining portion of the sheet. The compressed portion may be of any width desired but I prefer to'inake the same about four inches. After the edge portions are com ressed, the top side 0 the sheet a is pre erably finished to imitate slate or the ike, and it will be noted that it is not necessary to place this finish on the edge portion 2, but the finish will extend .over the top surface of the edge portion 3. After the top surface of the sheet is finished, the edge 2 is bent or wardly and then downwardly u on itsel while the edge portion 3 is bent ownwardly and then upwardly to form a fold as shown. lit will be recognized that the com ressed edge portions of the sheet when to dad are of approximately the same thickness as the remainder of the sheet, so that when the sheet is rolled, the edge portions will not interfere with the rolling.

In practice the last four or five inches, more or less of each edge of the sheet must be made approximately one-half the thickness of the remainder of the sheet, so that when folded over their combined thickness will be be same as the red. of the sheet. This it have discovered to be necessary for the reason that it the edges were not pressed down to such thickness, the place where the roofing or building 1paper is lapped or jointed together, wou d be equal to four thicknesses of the regular roofing orbuilding "paper, and hence when applied to the buildmg would be so thick t at it might cause water to stand or at least hinder the same ice from flowing freely, whereas when it is pressed down, as before described, the joint will be equal to only two thicknesses of the main portion of the sheet or the same as the thickness of thejoints in common roof-v ing now in use.

' Another very vital point relative to pressing down the edges so that their combined thickness when folded will be equal to the rest of the sheet is, that as the roofing is manufactured and put up in rolls, the roll will be the same thiclmess throughout, whereas if it was folded over and not reduced in thickness, the last few inches on each side would .be double the thickness of the remainder of the sheet and hence could not be rolled practically.

In laying this style of sheet material on a roof, the roll is rolled out and nailed on at the bottom of the roofing, and then the next layer is rolled out and pushed up so that the fold 2 on the sheet first laid catches into the fold 3 under the second sheet, thus giving an accurate lap. It will be understood that the present material is ver easy to lay, in fact, much easier. than or inary roofing or building paper, as the workmen with the ordinary sheet material have to be constantly careful to have it lap over the same distance along its entire length.

In laying the above type of sheet material as roofin I prefer to proceed as will now be describe in connection with Fi res 2 and 3. The first sheet 5 is unfoldefi along the line 6 in Figure 3 by moving the main portion of the sheet from the position which it occupied, in an anti-clockwise direction in order to permit the nails 7 to be driven through the folded edge 3 as shown.v Then the main portion of the sheet 5 is moved in a clockwise direction until it lies on the roof 8 as shown, and at this time the upper portion 9 of the folded edge will overlie the heads of the nails and will prevent leakage at the points where the nails are driven through. At this time a second sheet 10 is unrolled and its downwardly folded ed e portion 3 is interlocked with the upward y extending folded edge portion 2 of the sheet 5. When the edge portions 2 and 3 have been lapped as shown in Figure 3, the main portion of the sheet 10 is unfolded along the line 11, so that the sheet 10 will overlie the sheet 5. Then the nails 12 are driven through the folded portion 2 and through the underfolded portlon of the sheet 10, and then the sheet 10 is again folded alon the line 11, until it occupies the position s own in the drawing. Then a third sheet 13 is secured to the sheet 10 in the same manner as the connection of the sheets 5 and 10. It is to be noted that the nails used in securing the roof sheets in position, are driven through the material at points close to the fold line of the folded edge rtions 2 so as to permit the upwardly g lded portion of the edge portion 2 and the main porasses tion of the folded edge 3 to give or pull away from the roof when the roofing material or the roof itself expands.

It will be noted that with this method of securing the sheets in position, all of the nail heads are covered by unperforated portions of the sheets, so that there will be no leakage through the joints or through the nail holes.

If the invention is applied to building paper such as tar paper, then the sheets may be nailed on in the manner shown in Eigure 4. In this figure 14 designates the wall of a building to which is nailed a sheet 15. In securing this sheet in position nails 16 are passed through the fold 2, and after a sheet is secured at the upper portion of the wall, then a second sheet 17 may have its fold 2 hooked on the fold 3 at the lower edge of the sheet 15. Then nails 18 may be driven through the lapped joints of the two sheets to secure the same to the wall 14. 1

Subsequently a third sheet 19 may have its upper fold 2 hooked on the lower fold 3 of the sheet 17, and the lapped portions may be secured to the wall 14 by nails 20.

From the foregoing it will be understood that one advantage of the present roofing or building paper would be that it is easier to lay and may be laid more accurately. A second advantage is that the joints or laps do not have to be cemented as is the case with ordinary roofing. This manner of folding over does away with the necessity of cementing and still leaves an absolutely water-proof joint. A third advantage is that on ordinary roofing or building paper, it is necessary to nail about every two inches, whereas a oint with my improved fold needs to be nailed only every SIX inches or more. As the nails are furnished by roofing manufacturers, they would only need to furnish one-third as many as with ordinary roofing. Furthermore, the fact that it only requires one-third as many nails as ordinary roofing means that a workman can lay this material faster than the ordinary sheet material, and nail it in one-third of the time that is required to nail the ordinary sheet material.

It is to be understood that the present invention is applicable to all classes of roofing sheet material; that is, common one-pl two-ply, etc., as well as the difierent km s of roofing paper such as corrugated and slate or other finish. The invention is also use only very few nails and can put the paper on much faster than he can ordinary tar paper.

From the foregoing it will be understood that the present sheet material has the following special features or advantages over the old style:

1st. Absolutely leak-proof.

2nd. Cementing not necessary.

3rd. Only half or one-third as many nails necessary.

4th. The nails concealed, hence cannot rust.

5th. One inch or more of expansion or contraction possibilities, hence roofing will not tear or pull out nails. I

6th. Neater in appearance when laid.

7th. Wind cannot get under it and make wide sheets flap.

8th. Will last much longer.

From the foregoing it is believed that the construction, operation and advantages of the present invention will be readily understood, and it is a parent that various chan es may be ma e in the details illustrate and in the steps set forth without departing from the spirit of the invention as expressed in the claims.

What I claim and desire to secure by Letters-Patent is:

1. Sheet material having one side edge portion folded u wardly onto the upper face of the sheet an its opposite edge portion folded downwardly onto the under-surface of the'sheet, the folded edge portions being approximately-half the thickness of the remaining portions of the sheet.

2. The combination with a buildin of sheet material arranged on said buil ing,

' tions of said sheets and relatively remote.

from the fold lines of the underfolded portions of said sheets to permit expansion and contraction.

In testimony whereof I aflix my signature.

SVEND PETERSEN. 

